By the way, based on these events we're now looking at adding one last minute feature to v10: automatic CBT reset on each VM when Active Full backup is performed. Looking back at the past few CBT bugs, having this would have helped everyone to make sure they have a good backup without having to mess with CBT reset scripts.

better than nothing but doesn't solve the problem if you don't use active full, and for all the backup between a revert to snapshot (monday for example) and an active full (sunday)